Transmission



O. M. POPE TRANSMISS ION March 26, 1929.

Filed NOV. 2, 1925 2 SheetS-Sheet .710, mwzm O. M. POPE TRANSMISSION March 26, 1929.

2 Shees-sneex Filed Nov. 2, 1925 Orson M Papa w /fffw atto'z www Patented Mar. 26, 1929.

PATENT OFFICE.

onson mroi'n, or isEAr'rLn, wsHING'roN.

' rnANsmrssIon.

Application -fi1ed November `My nvention relatesto transmission inechanism and, in one aspect, relates .to a selective clutch device whereby a selected clutch element, one of several, may be en-` gaged b a complemental clutch elementto drive a riven shaft to which the first selected clutch element is, connected directly or indivrectly, the complelnental clutch element beingconnected to the drivingshaft. In `anotherl aspect it relates to the transmssion gearing, by means of which the entirerange of varying speeds may be obtained, including speeds in reverse, without the necessity of shifting gears, and in suchmanner that at the highest speed, the one most frequently in use, the trainof gears is dead.

Considered Vfrom the first aspect, it is an object of my invention to provide a selective clutch mechanism whereby a selector is shiftableto be postioned to cause engagement of two complemental clutch elements, and to the provision of means forcausing 01' permitting. engagement thereof, the two means for shift-' ing and for causing engagement being con- .nected to operate ,together without interference.V y I 4Viewed from thev second aspect, it is one object of my invention to provide a transmission gearing by means of which the highest' speed forward may be a direct drive without the interposition or the necessity of rotating intermediate gears between the driving and driven shafts.

A` further object in this connection is the provision of clutch or drivel members shiftable to connect either a forward or reverse gear with the driven `shaft, but so disposed thatfshifting is only necessary todetermine the direction of movenient, that is, when the car is standing still and it is desired to go either forward or backward, thus 'eliminatingthe clashing of gears due to shifting while in motion and gathering'speed.

Other objects, especially those relating to structural details, will be apparent as the description progresses. i

My invention comprises' the novel parts, and the novel combinations and arrangements thereof, as shown in the accompanying drawings, described in this specification, and particularly defined by the claimsterminating the same. i

In the accompanying drawings I have shown my invention embodied in a form which is now preferred by me, it being vun-` derstood that variations in the' mechanical 2,` 1925. serial-No. 86,248.,V

details and arrangements may be made with-V out` departingl from .the spirit of the invention. Figure 1 is a plan view of aselectiveclutch mechanism, and Figure 2 is an end elevation thereof;

Figure 3 entire clutch and transmission gearing, taken at right angles to F igure l; i Figure 4 is a transverse section, one-half being along the line auf-a of Figure 3, and the other half being along the line b--b; o

Figure 5 is a perspective exploded view of the cam or gripping members employed in the selective ,clutch mechanism.

Figure 6 isan elevation of the Safety positioning means, and

Figure 7 isa perspective view of a modified detail. i

My present invention, in one aspect, is applicable to: various types of transmission gearing, as,for example, Vthat shown in my is anl axial section through the` PatentNo. 1,503,O05.`l In that patent a number of variable .speedgearsf remain perma- Vnently in mesh andare engaged by a selective clutch mechanism which determines the particular gears tobe driven. In the prosent instance, as in-the patent referred to, I have shown a plurality of drums 1, 2 and 3,

which are connected .to a driven shaft .60,`

either directly as by the key V10, or indirectly, as through the gears 20, 30 and the like. The drums 1,2 and 3 arepreferably'of the same diameter`` and width of face, and are mounted on the driven shaft 60 to rotate therewith or thereabout.`

Comple'mental to the drums 1, and 3 is the i,

selector which is shown herein as comprising a r1ng-l1ke member 4 adapted to be constrlcted upon any one of theV drums according toits position. The ring 4Vmay, for convenience of manufacture, assembly andrepair orrelining, be composed of two halves retained within a second resilient ring-like member 40 by means of stub shafts 41 passing through slotted ears 42 and 43 on the rings 4 and 40, respectively. A spring44 serves to maintain the two halves of the rings 4 and 40 positively separated, and

these halves may be drawn together to con-` -expand the ring '4.

permit easy removal of the entire assembly. Doubleefaced cam members, 'designated 46', as sho wn in Figure 7, may be employed i-n lieu' of the single-faccd cams and V46, thus equalizino' stresses at opposito sides of the shaft 41,

and eliminating any possibility of binding. djustment and a means for taking up Wear is provided in the Castle-- nut 47 on the end of the shaft 41. Oscillation of the shaft, and

conseque-ifit censtrictionof relaxation of the ring't, is obtained through alever 48 secured upon the opposite end of the-sha'ft 41.

By the means' above described, the ring, when in position, is constricted upon any vseleeted 'drum 1, It is necessary'in'this embodiment to 'sh'ift the'ri'ng' `4 itself-an'd its control means, as Well, although it will be evident that -the device might he arranged With-a ringV4-f(-r'- each 'drunnthe'means controlling` its constrictiononly being shift'ed. Itloweveiyto control the shifting of the'ri'ng 4 and its control means, the' ring'40- is' connectedthrough a res-iflientyoke 50 toa clutch sleeve o. The sleeve 5 nfr'ountedV upon the driving shaft 6 in such a way as tol-iern'iitits sliding axiallyV thereo'f' but to rotate the-rewith. This may conveniently be accomplished by a' splined connection, as'ilnstrated in fI1``igures 1 and 2.V Afyoke v'51.engi'iging' pins 52 lin a collar 53 4lo'osely monnted in the sl'eeve 5, forms p-art'of a lev'er llep'itfotedv at 55'and operable by a'link 56 connected to one (end,

' by means of which the leve'r can be swa-ngand the yoke 51 and sl'eevef'consequently shifted.

In orderfito control the con'stri'ction of. the ring4 in-itsseveral positions,`the lever 554 is made hollow to permi't the re'cepfti'on therein of a shaft forming one bearing of'a Crank-71 connectedat 72'toa link73I Theopposite end of the li'nk'73 is connected to a collar 7, which is mounted upon and slid'abl'eaxially of the clutch sleeve 5. A second ring 74 is mounted upon' the collarf7 and isconnected by arn'ls 75 to the ends of4 the rocker' arms48. A

joint 78.

It fis quite 'essenti'al'that'the devicebe so arrai'iged 'that 'the ring 4 may rnot he. constricted except when in propor'position relativ'o to one ofthe 'drums |'1, 2 or 3; otherwise, if it Were permitted to'be (':onstrioted When spanning two'drums, t'wo different sets of drive gears'wouldbe connecteclto the driving shaft', With possibly disastrous results. As

seenl in Fignre 6, safety means are provided to `prevent this. They Will 'operate also "whether or not the clutch release podal (connected to'the shaft 7,7, but not shown) is thrown out prior to sliifti ng, to insure release ofthering 4 during shiftinrg'. An arm 9, secured on the end of the shart 70, must move as 'the shafft issw'nng on the piyot 55 to shift the position of the selectoi'. The shaft 70 must rotate or oscillate on its axis to permit engagement or 'disengagenient 'of the ring '4. By providing a dog '90 on the arm 9, en,:;ag ge` able in notches '91, '92, and 93 of al fixed meinber 94,`which' may be formed as Vpart of a housing` enclosing the transmission and clutch, the shaft 70'can rock tovpermit engagement lofthe ring' 4with a :drum only When the dog'90 is oppo'site 'one of the n'ot'c'hes 91, 92 or 93. These notches can be spaced by an amount corresponding to the swing of the end' of shaft 70 in shifting' the ring 4 between adjacent drums, hence engagem'ent of the dog 90 with' the raised spa'ces 'between notches Will prevent gripping of the ring 4 except When properly positi'one'd'oppositea single drum. The 'dog 90 and' the i'iot'ches 'can be so shaped that they will diseng'age upon swinging of the shaft 70, vand this will' insure i disengagem'ent of the ring 4, as the dog rides out of a notch, 'While the shift is being-made' member, but only When the constricting means is properly positioned.

It Will be observed that the drumjlis' keyed directly to the drivenshaftl'O. fHence, When this drum is olutched, a direct drive from the drivingshaft 6 to thev d'riv'en-sl'iaft 60- is obtained Without the interposition' of the fd'1,'u1n.-'l 2 and 3 and'without the necessity of turning any of thegears. The drum 2 andfits gear' 20, and the drum 3' and its gear 30 are loose upon the shaft 4, as is also the forWardgear 8. Each of thesegears 20, and 8 is connected to a complemental gear 21, 31 and'8-l, respectively, secured 'to Vor lformed as, an integral part of the countershaft V80. AThe countershaft, in addition, carries argear '82 continuously in mesh With an internal gear 83,10osely mounted upon Vthe Adri-ven. shaft. 60, and by means of .which reVerse motionis accomplished.

The aligned 'gears 8 and 83are eacl'rproi Vided with jaw clutch members 84, and =a complemental clfutch element 85 provided.

With jaws 8G to engage the ia-'ws 84is-leyeid upon the driven s'haft 60 an'd'is shiftable, as by means of a'lever 87, lfrom a neutral posiis set in motion, thmue'h the gears and 3h' the (v'oiuitershaft 8(),-and the gears 81` and `8,

Llt)

element ,is shift i eminect it pwith the driven shatt..` By engaging the drum t, tlu` entiretrain ol gears then and a lowy ftnward speed is obtained. AThis speed can be increased by engaging the drum 2, retainingthe clutch element 85 in-engagc--` ment with the Jaws of the gear 8.` The iii- .V

Grease of speed results from the higher ratio in gears 20 and 21, the former being connecti, ed to the drum 2. For the hlghest speed,;the i It is possible to drive With the shaft 60,`

although the form described is preferred at this time. When thus reversed, the ratio of the gears 82 and 88 must be reversed, so that 82 is the larger. So arranged, and with the clutch element 4 connected to the driven shaft, the ring 4 might be permitted to grip either drum 2 and, but so long as the clutch member 85 was in neutral position, no gears would turn; hence for idling they would be dead, and only the drum 1 would turn. This could not be permitted with the preferred arrangei'nent, as the ring 4, which is always turning, would either have to be shifted to a neutral position, as to a dummy drum (not shown), or it would have to be heldout, as by the throw-out pedal or by the dog 90. The arrangement of parts to accomp'lish these results is well within the capabilities of an ordinarily skilled mechanic, hence they have not been shown.

lVhat I claim as my invention is:

1. In. combination with driving and driven shafts, selective clutch mechanism including a plurality of drums mounted upon one of said shafts, a clutch sleeve rotative With and slidable lengthwise of the other shaft, operative connections between each of said drums and the shaft whereon they are mounted, a ring-like clutch member mounted upon said clutch sleeve, and slidable therewithinto position to engage any one of said drmns. a yoke engaged with said sleeve to shift it, a lever operatively engageable with said yoke. a rollar slidable axially of the shaft which carries the clutch sleeve, operative connections between said collar and said clutch member to constrict the lattcr about a start in a forward ,direei tion, the car beinof at a. standstill, the clutch od to engage the `fear 8 and selected' drum upon inovelnent of thecollar, and a Crank journaled in said lever and swingable therewith, Vandoperatively connected to said collar, said crank being rotatableindependently of the lever. to move said collar.

lin combination with driving and driven shafts, selectiveclutch niechanism lncluding a piurality of Vdrums Vmounted upon one of raid shafts, a clutch sleevei'otative Vwithand slidable lengthwise of the other shaft, operatlve connections between each of said drums and lthe shaft whereon they are mounted, a.

ring-like clutch member mouned upon said clutch sleeve, and slidable therewith into position to engage any one of said drums, a yoke engaged With said sleeve to` shift it,a lever operatively engageable with said yoke, a collar slidable axially of the shaft which carries the clutch sleeve,operative connections between said collar and said clutch member toconstrict the latter about a selected drum upon movement of the collar, and a crank vjournaled in said lever and swingable therewith, and operatively connected to said collar, said crank being rotatable independently of the lever to move saidcollar, a safety dog project-mg from and rotative with said Crank, and swingable therewith as the shifting lever swings, and a fiXed member positioned adjacent said dog and having a plurality of notches each Vcorrespondmg to one of said dru'ms, said notches being spaced and ar-v ranged, relative to the path of swing of the dog, to prevent rotation of the dog and its crank into position to constrict said ringlikeV clutch member upon a drum unless the said clutch member is properly positioned relative to a singledru 3.`In combination With a driving and a driven shaft, a sleeve slidable axially of and rotatable with one of said shafts, a collar mounted upon and slidable axially and indedendently of said sleeve, a plurality of drums mountedupon and rotatable about or WithA the second of said shafts, a clutoh'member complemental to said drums and adapted to engage any one of-them, means supporting said clutch member from said sleeve, to be shifted thereby, means operatively connecting said collar and said clutch member, independently of the sleeve, to engage the clutch member with a selected drum, a pivoted arm connected to said sleeve to shift it and the clutch member, and a lever operatively connected to said collar, andv journaled lengthwise of said arm and swingable therewith, to. control engagement and disengagement of said clutch member in any selected position thereof.

4. In combination with a driving and a driven shaft, selective clutch mechanism comprising a plurality of drums, a clutch memi ncctions between each of said drums and one of said shafts and between said clutch member and the-other shaft, means 'for-sl'iifting said clutch member' into position to en'gage any one of said drums, means controlling engagement of the clutch member With a selected drum, positio'ning means including a member fixed relative to said shitting means and a second member movable therewith and contr'ollable by said means which controls enga'gemel-lt of the clutch member and the drums, said second member of the positi'oning means cooperatin;v With the v first member thereof to permit engagement of the clutch member With a drum only when the two 'are properly positoned relative to 'each other.

5. 'In combination, a drving sh-a-t and'a driven shaft -aligned therew'th, low valn'd intermediate gears looselym'ounte'd on one of said sha'fts, a forward anda 'reve'rse gear also loosely mounted on the-same=shatt,' means'f0r selectlvely connectng either 'said forward or said reverse gear, or neither, to' its shaft,

a countershaft having gears 'contin'uously mesh'ing with all of said first' gears, a plura'lity of cl'utch members, 'one lfyeing operatively connected to each 'of' said 'low `and intermediate gears, a like clute'h men'1ber-keyed toth'e shaft which carries 'the '*low, 'intei'nietlia-te, forward -axrd reverse gears, lnt'ch element rotatable With the other' sha'ft, complemental to said clut'ch members, a-n'd sele'ct've'ly engafigeable withany one thereof, and means controlling engagement" oflsa'id selectiv'e 'connecting' mean's'with the forward or reve'rse gear, whereby, upon flnovem'ent-l there'cf' intoneutral' position, said 'sli'fft-s' 'maybe' directly connected 'through said 'cutehelement *and the lkeyeel-on elu-toh* member, 'without int-erpo'stion of an Vof'sa'dl'fflearssa'gned at *eat-ue, fifahmgn,fthis imhday of October,'l92'5.

oRsoN M. iIfo'I-*n 

